A novel TiO2-SiO2 aerogel nanocomposite absorbent: preparation, characterization and photocatalytic degradation effects on automobile exhaust. (28th February 2018)

• Record Type: Journal Article
• Authors: Zhang, Saisai; Zhang, Zhengqi; Pei, Jianzhong; Li, Rui; Zhang, Jiupeng; Cai, Jun; Cui, Jiexue
• Is Part Of: Materials research express. Volume 5:Number 2(2018)
• Publication Date: 2018-02-28
• Subjects: TiO2-SiO2 aerogels -- nanocomposite absorbent -- preparation -- automobile exhaust -- photocatalytic degradation effects; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/aaaf10
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: In this paper, a novel TiO2 -SiO2 aerogel nanocomposite absorbent was successfully synthesized using the sol-gel and ambient pressure drying method, and its photocatalytic degradation effects on automobile exhaust were investigated for the first time. The microstructures and properties of the Nano TiO2 -SiO2 aerogels were characterized using various methods, including x-ray Diffraction (XRD), Brunauer–Emmett–Teller (BET) specific surface area analysis, Scanning Electron Microscope (SEM), Energy Dispersive Spectroscopy (EDS) and Fourier Transform Infrared Spectroscopy (FT-IR). The exhaust purification tests were conducted in a self-developed instrument to investigate the degradation effects of Nano TiO2 -SiO2 aerogels on automobile exhaust through degradation rate. Experimental results showed that the Nano TiO2 -SiO2 aerogels had a good photocatalytic degradation effect on automobile exhaust, and the degradation rates of CO, CO2, HC and NOx were 1.3%, 1.5%, 3.2% and 34.4%, respectively. The well-designed microstructure makes the Nano TiO2 -SiO2 aerogels a stable photocatalytic material with high specific surface area and big average pore size, which has promising applications in environmental treatment.